fix gcc builds

.github/workflows/build.yml

@@ -19,9 +19,9 @@ jobs:
       - name: Install required packages
         uses: awalsh128/cache-apt-pkgs-action@latest
         with:
-          version: 3.0
+          version: 4.0
           packages: >-
-            clang
+            build-essential
             cmake
             ninja-build
             libboost-dev

Projects/Engine/Header/App/V8/Tree/Instance.hpp

@@ -2,6 +2,7 @@
 
 #include <stdexcept>
 #include <string>
+#include <cstddef>
 
 #include <OGRE/Ogre.h>
 #include <boost/shared_ptr.hpp>

Projects/Engine/Header/Helpers/Name.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <map>
+#include <cstddef>
 
 namespace RNR
 {